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Proceedings Article

Design and analysis of quasi-optical THz time domain imaging systems

[+] Author Affiliations
Claudia Brückner, Boris Pradarutti, Andreas Tünnermann

Fraunhofer Institute for Applied Optics and Precision Engineering (Germany) and Friedrich-Schiller-Univ. Jena (Germany)

Ralf Müller, Stefan Riehemann, Gunther Notni

Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)

Proc. SPIE 7100, Optical Design and Engineering III, 71000S (September 27, 2008); doi:10.1117/12.797606
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From Conference Volume 7100

  • Optical Design and Engineering III
  • Laurent Mazuray; Rolf Wartmann; Andrew Wood; Jean-Luc Tissot; Jeffrey M. Raynor
  • Glasgow, Scotland, United Kingdom | September 01, 2008

abstract

A THz time domain imaging system is optimized and analyzed with ZEMAX. The requirements to the optical design of time domain imaging systems in the THz spectral region are deduced. A system is presented, which is diffraction-limited for wavelengths down to 838 μm and field points up to ±4 mm. In the optical system a 90° off-axis parabolic mirror is combined with an aspheric plastic lens. The lens was made from ZEONEX E48R®, and it was manufactured by ultraprecision machining. A resolution test of the system shows that on time domain analysis of the pulse maximum on-axis 1 LP/mm can be resolved with an intensity contrast of 0.22. The resolution of the outermost field point is 0.67 LP/mm with an intensity contrast of 0.23. An outlook of an optimized system for imaging a field of ±10 mm in x- and y-direction is given.

© (2008) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Claudia Brückner ; Boris Pradarutti ; Ralf Müller ; Stefan Riehemann ; Gunther Notni, et al.
"Design and analysis of quasi-optical THz time domain imaging systems", Proc. SPIE 7100, Optical Design and Engineering III, 71000S (September 27, 2008); doi:10.1117/12.797606; http://dx.doi.org/10.1117/12.797606


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